Buoyancy Arms Specifications

All weights for large buoyancy arms are +/- 2 oz

Large Buoyancy double ball arm segments were designed for the heavy Digital SLR housings and video housing. They are 2″ in diameter and constructed the same as the regular buoyancy arms. They range in size from 8″ to 16″ in 2″ increments to be able to add just the amount of buoyancy you need to offset the weight of the housing and strobes or lights.

It is important to weigh your whole system underwater. This can be done in a pool or a large laundry tub. Use a rope to gather the whole setup together and then hang a scale from the rope, keeping the entire unit under the water. A luggage scale is perfect for this, just be careful not to get the scale itself wet. Once you know what it weighs then you can decide how much of that weight you would like to take off the system with the sections of the buoyancy arms listed above. Please call us to discuss the results of the above tables and how they correlate to your weighed system. You might want to weigh your system with different lenses and ports for more accurate diving conditions.

With two arm lengths, 1 AC-CSB, 2 AC-CSF, and 1 strobe adapter and 1 base adapter these are the calculations: You will need to add in the weight of your strobes underwater to these calculations to get you to the buoyancy you need.

*Salt water is approximately 1.026 times more dense than fresh water. All these tests were done in fresh water.

It is important to weigh your whole system underwater. This can be done in a pool, large laundry tub, use rope to gather the whole set up together and then hang a scale from the rope, keeping the entire unit under the water. A luggage scale can work well for this. Just be careful not to get the scale itself wet. Once you know what it weighs then you can decide how much of that weight you would like to take off the system with the sections of the buoyancy arms listed above. You might want to weigh your system with different lenses and ports for more accurate results.